Weather Station is using SHT25
sensor by sensirion as temperature and humidity sensor. It has excellent accuracy specifications.
Temperature accuracy is +-0.1°C και humidity is +-2.0°C. Detail here
It is housed inside a Radiation Shield by ambient weather, which is this:
New version is coming!!! It will use the best sensor ever, the SHT35!!! And it will have two at the same time!!!! So it will have two data inputs!!! And it will decide by itself!!
Temperature accuracy is +-0.1°C και humidity is +-1.5°C. Detail here
And the pressure sensor will be in the same pcb. So it will be outdoor too!!! It means better readings than indoor!
You can see the new pcb here....